Obama administration says IAEA discovery during inspection last year points to weapons program

WASHINGTON—The Obama administration has concluded that uranium particles discovered last year at a secretive Iranian military base likely were tied to the country’s past, covert nuclear weapons program, current and former officials said, a finding that contradicts Tehran’s longstanding denials that it was pursuing a bomb.

Traces of man-made uranium were found at the Parchin facility, southeast of Tehran, by investigators from the International Atomic Energy Agency, the United Nations’ nuclear watchdog, as part of an investigation...